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The city of Rockville is in the state of Maryland. It has the following active area codes:
NPA | NXX | Usage | Company Name | NXX Introduced Date |
---|---|---|---|---|
301 | 214 | Landline | Verizon Maryland, Inc. | 02/04/1994 |
301 | 217 | Landline | Verizon Maryland, Inc. | 02/04/1994 |
301 | 217 | Landline | Verizon Maryland, Inc. | 02/04/1994 |
301 | 217 | Landline | Verizon Maryland, Inc. | 02/04/1994 |
240 | 221 | Landline | Verizon Maryland, Inc. | 05/10/1999 |
240 | 221 | Landline | Verizon Maryland, Inc. | 05/10/1999 |
240 | 221 | Landline | Verizon Maryland, Inc. | 05/10/1999 |
301 | 230 | Landline | Verizon Maryland, Inc. | 02/04/1994 |
301 | 230 | Landline | Verizon Maryland, Inc. | 02/04/1994 |
301 | 230 | Landline | Verizon Maryland, Inc. | 02/04/1994 |
301 | 231 | Landline | Verizon Maryland, Inc. | 02/04/1994 |
301 | 231 | Landline | Verizon Maryland, Inc. | 02/04/1994 |
301 | 231 | Landline | Verizon Maryland, Inc. | 02/04/1994 |
240 | 238 | Landline | Paetec Communications, Inc. - Md | 10/13/1999 |
240 | 238 | Landline | Paetec Communications, Inc. - Md | 10/13/1999 |
240 | 238 | Landline | Paetec Communications, Inc. - Md | 10/13/1999 |
301 | 244 | Landline | Telcove Operations, Inc. - Md | 01/11/1997 |
301 | 244 | Landline | Telcove Operations, Inc. - Md | 01/11/1997 |
301 | 244 | Landline | Telcove Operations, Inc. - Md | 01/11/1997 |
301 | 251 | Landline | Verizon Maryland, Inc. | 02/04/1994 |
301 | 251 | Landline | Verizon Maryland, Inc. | 02/04/1994 |
301 | 251 | Landline | Verizon Maryland, Inc. | 02/04/1994 |
301 | 255 | Landline | Verizon Maryland, Inc. | 01/11/1997 |
301 | 255 | Landline | Verizon Maryland, Inc. | 01/11/1997 |
301 | 255 | Landline | Verizon Maryland, Inc. | 01/11/1997 |
240 | 268 | Landline | Allegiance Telecom, Inc. - Md | 02/27/1999 |
240 | 268 | Landline | Allegiance Telecom, Inc. - Md | 02/27/1999 |
240 | 276 | Landline | Verizon Maryland, Inc. | 05/04/2004 |
240 | 276 | Landline | Verizon Maryland, Inc. | 05/04/2004 |
301 | 279 | Landline | Verizon Maryland, Inc. | 02/04/1994 |
301 | 279 | Landline | Verizon Maryland, Inc. | 02/04/1994 |
301 | 279 | Landline | Verizon Maryland, Inc. | 02/04/1994 |
301 | 284 | Landline | Mci Worldcom Communications, Inc. - Md | 01/11/1997 |
301 | 284 | Landline | Mci Worldcom Communications, Inc. - Md | 01/11/1997 |
301 | 288 | Landline | Mci Worldcom Communications, Inc. - Md | 01/10/1996 |
301 | 288 | Landline | Mci Worldcom Communications, Inc. - Md | 01/10/1996 |
301 | 288 | Landline | Mci Worldcom Communications, Inc. - Md | 01/10/1996 |
301 | 294 | Landline | Verizon Maryland, Inc. | 02/04/1994 |
301 | 294 | Landline | Verizon Maryland, Inc. | 02/04/1994 |
301 | 294 | Landline | Verizon Maryland, Inc. | 02/04/1994 |
301 | 295 | Landline | Verizon Maryland, Inc. | 02/04/1994 |
301 | 296 | Landline | Mci Worldcom Communications, Inc. - Md | 07/04/1995 |
301 | 296 | Landline | Mci Worldcom Communications, Inc. - Md | 07/04/1995 |
301 | 309 | Landline | Verizon Maryland, Inc. | 02/04/1994 |
301 | 309 | Landline | Verizon Maryland, Inc. | 02/04/1994 |
301 | 309 | Landline | Verizon Maryland, Inc. | 02/04/1994 |
240 | 314 | Landline | Verizon Maryland, Inc. | 06/13/2000 |
240 | 314 | Landline | Verizon Maryland, Inc. | 06/13/2000 |
240 | 314 | Landline | Verizon Maryland, Inc. | 06/13/2000 |
301 | 315 | Landline | Verizon Maryland, Inc. | 07/01/1996 |
301 | 315 | Landline | Verizon Maryland, Inc. | 07/01/1996 |
301 | 315 | Landline | Verizon Maryland, Inc. | 07/01/1996 |
301 | 319 | Landline | Verizon Maryland, Inc. | 07/01/1996 |
301 | 321 | Landline | Telcove Operations, Inc. - Md | 07/06/1997 |
301 | 321 | Landline | Telcove Operations, Inc. - Md | 07/06/1997 |
301 | 321 | Landline | Telcove Operations, Inc. - Md | 07/06/1997 |
240 | 328 | Landline | Verizon Maryland, Inc. | 08/20/2000 |
240 | 328 | Landline | Verizon Maryland, Inc. | 08/20/2000 |
240 | 328 | Landline | Verizon Maryland, Inc. | 08/20/2000 |
301 | 339 | Landline | Cavalier Telephone Mid-atlantic, Llc - Md | 10/11/1997 |
301 | 339 | Landline | Cavalier Telephone Mid-atlantic, Llc - Md | 10/11/1997 |
301 | 340 | Landline | Verizon Maryland, Inc. | 02/04/1994 |
301 | 340 | Landline | Verizon Maryland, Inc. | 02/04/1994 |
301 | 340 | Landline | Verizon Maryland, Inc. | 02/04/1994 |
301 | 354 | Landline | Teleport Communications America, Llc - Dc | 01/10/1996 |
301 | 354 | Landline | Teleport Communications America, Llc - Dc | 01/10/1996 |
301 | 380 | Landline | Verizon Maryland, Inc. | 02/04/1994 |
301 | 382 | Wireless | Verizon Maryland, Inc. | 10/15/1996 |
301 | 382 | Wireless | Verizon Maryland, Inc. | 10/15/1996 |
301 | 382 | Wireless | Verizon Maryland, Inc. | 10/15/1996 |
301 | 398 | Landline | Verizon Maryland, Inc. | 10/09/2003 |
301 | 398 | Landline | Verizon Maryland, Inc. | 10/09/2003 |
301 | 400 | Landline | Verizon Maryland, Inc. | 03/29/2010 |
240 | 401 | Wireless | New Cingular Wireless Pcs, Llc - Dc | 11/20/1998 |
240 | 401 | Wireless | New Cingular Wireless Pcs, Llc - Dc | 11/20/1998 |
240 | 401 | Wireless | New Cingular Wireless Pcs, Llc - Dc | 11/20/1998 |
240 | 403 | Landline | Cavalier Telephone Mid-atlantic, Llc - Md | 08/20/2000 |
240 | 403 | Landline | Cavalier Telephone Mid-atlantic, Llc - Md | 08/20/2000 |
240 | 406 | Wireless | New Cingular Wireless Pcs, Llc - Dc | 09/17/2009 |
240 | 406 | Wireless | New Cingular Wireless Pcs, Llc - Dc | 09/17/2009 |
240 | 408 | Wireless | New Cingular Wireless Pcs, Llc - Dc | 10/14/2009 |
240 | 408 | Wireless | New Cingular Wireless Pcs, Llc - Dc | 10/14/2009 |
301 | 413 | Landline | Verizon Maryland, Inc. | 02/04/1994 |
301 | 413 | Landline | Verizon Maryland, Inc. | 02/04/1994 |
301 | 413 | Landline | Verizon Maryland, Inc. | 02/04/1994 |
240 | 421 | Wireless | Omnipoint Communications Cap Operations, Llc | 04/09/2001 |
240 | 421 | Wireless | Omnipoint Communications Cap Operations, Llc | 04/09/2001 |
240 | 421 | Wireless | Omnipoint Communications Cap Operations, Llc | 04/09/2001 |
301 | 424 | Landline | Verizon Maryland, Inc. | 02/04/1994 |
301 | 424 | Landline | Verizon Maryland, Inc. | 02/04/1994 |
301 | 424 | Landline | Verizon Maryland, Inc. | 02/04/1994 |
240 | 428 | Landline | Bandwidth.com Clec, Llc - Md | 10/14/2009 |
240 | 428 | Landline | Bandwidth.com Clec, Llc - Md | 10/14/2009 |
240 | 433 | Landline | Cavalier Telephone Mid-atlantic, Llc - Md | 08/20/2000 |
301 | 438 | Landline | Verizon Maryland, Inc. | 02/04/1994 |
301 | 438 | Landline | Verizon Maryland, Inc. | 02/04/1994 |
301 | 443 | Landline | Verizon Maryland, Inc. | 02/04/1994 |
301 | 443 | Landline | Verizon Maryland, Inc. | 02/04/1994 |
301 | 443 | Landline | Verizon Maryland, Inc. | 02/04/1994 |
240 | 447 | Wireless | New Cingular Wireless Pcs, Llc - Dc | 02/27/1999 |
240 | 447 | Wireless | New Cingular Wireless Pcs, Llc - Dc | 02/27/1999 |
240 | 447 | Wireless | New Cingular Wireless Pcs, Llc - Dc | 02/27/1999 |
240 | 453 | Landline | Verizon Maryland, Inc. | 11/20/1998 |
240 | 453 | Landline | Verizon Maryland, Inc. | 11/20/1998 |
240 | 453 | Landline | Verizon Maryland, Inc. | 11/20/1998 |
301 | 460 | Landline | Verizon Maryland, Inc. | 02/04/1994 |
301 | 460 | Landline | Verizon Maryland, Inc. | 02/04/1994 |
301 | 461 | Wireless | Cellco Partnership Dba Verizon Wireless - Md | 05/18/1998 |
301 | 461 | Wireless | Cellco Partnership Dba Verizon Wireless - Md | 05/18/1998 |
301 | 461 | Wireless | Cellco Partnership Dba Verizon Wireless - Md | 05/18/1998 |
301 | 468 | Landline | Verizon Maryland, Inc. | 02/04/1994 |
301 | 468 | Landline | Verizon Maryland, Inc. | 02/04/1994 |
301 | 468 | Landline | Verizon Maryland, Inc. | 02/04/1994 |
240 | 471 | Landline | Global Crossing Local Services, Inc.-md | 02/27/1999 |
301 | 493 | Landline | Verizon Maryland, Inc. | 02/04/1994 |
240 | 506 | Wireless | New Cingular Wireless Pcs, Llc - Dc | 01/09/2002 |
240 | 506 | Wireless | New Cingular Wireless Pcs, Llc - Dc | 01/09/2002 |
240 | 506 | Wireless | New Cingular Wireless Pcs, Llc - Dc | 01/09/2002 |
240 | 516 | Landline | Us Lec Of Maryland, Inc. | 01/14/2000 |
301 | 517 | Landline | Verizon Maryland, Inc. | 02/04/1994 |
301 | 517 | Landline | Verizon Maryland, Inc. | 02/04/1994 |
301 | 517 | Landline | Verizon Maryland, Inc. | 02/04/1994 |
240 | 521 | Landline | Verizon Maryland, Inc. | 01/10/2017 |
301 | 522 | Wireless | Verizon Maryland, Inc. | 04/01/1997 |
301 | 522 | Wireless | Verizon Maryland, Inc. | 04/01/1997 |
301 | 522 | Wireless | Verizon Maryland, Inc. | 04/01/1997 |
301 | 529 | Wireless | New Cingular Wireless Pcs, Llc - Dc | 08/14/1998 |
301 | 529 | Wireless | New Cingular Wireless Pcs, Llc - Dc | 08/14/1998 |
301 | 529 | Wireless | New Cingular Wireless Pcs, Llc - Dc | 08/14/1998 |
301 | 530 | Landline | Verizon Maryland, Inc. | 02/04/1994 |
301 | 544 | Wireless | Verizon Maryland, Inc. | 11/20/1998 |
301 | 544 | Wireless | Verizon Maryland, Inc. | 11/20/1998 |
301 | 544 | Wireless | Verizon Maryland, Inc. | 11/20/1998 |
301 | 545 | Landline | Verizon Maryland, Inc. | 10/11/1997 |
301 | 545 | Landline | Verizon Maryland, Inc. | 10/11/1997 |
301 | 545 | Landline | Verizon Maryland, Inc. | 10/11/1997 |
240 | 550 | Wireless | New Cingular Wireless Pcs, Llc - Dc | 03/26/2009 |
240 | 550 | Wireless | New Cingular Wireless Pcs, Llc - Dc | 03/26/2009 |
240 | 551 | Wireless | New Cingular Wireless Pcs, Llc - Dc | 03/25/2009 |
240 | 551 | Wireless | New Cingular Wireless Pcs, Llc - Dc | 03/25/2009 |
240 | 552 | Wireless | New Cingular Wireless Pcs, Llc - Dc | 03/25/2009 |
240 | 552 | Wireless | New Cingular Wireless Pcs, Llc - Dc | 03/25/2009 |
301 | 564 | Landline | Verizon Maryland, Inc. | 02/04/1994 |
240 | 567 | Landline | Verizon Maryland, Inc. | 07/12/2006 |
240 | 567 | Landline | Verizon Maryland, Inc. | 07/12/2006 |
301 | 571 | Landline | Verizon Maryland, Inc. | 02/04/1994 |
301 | 581 | Landline | Verizon Maryland, Inc. | 04/01/1997 |
301 | 584 | Landline | Baltimore-washington Telephone (bwt) | 06/13/2000 |
301 | 598 | Landline | Verizon Maryland, Inc. | 02/04/1994 |
301 | 598 | Landline | Verizon Maryland, Inc. | 02/04/1994 |
240 | 599 | Landline | Broadwing Communications. Llc - Md | 07/22/1999 |
240 | 599 | Landline | Broadwing Communications. Llc - Md | 07/22/1999 |
301 | 603 | Landline | Verizon Maryland, Inc. | 07/01/1996 |
301 | 603 | Landline | Verizon Maryland, Inc. | 07/01/1996 |
301 | 605 | Landline | Verizon Maryland, Inc. | 10/15/1996 |
301 | 605 | Landline | Verizon Maryland, Inc. | 10/15/1996 |
301 | 610 | Landline | Verizon Maryland, Inc. | 10/15/1996 |
301 | 610 | Landline | Verizon Maryland, Inc. | 10/15/1996 |
301 | 610 | Landline | Verizon Maryland, Inc. | 10/15/1996 |
240 | 614 | Wireless | Metro Pcs, Inc. | 07/16/2013 |
240 | 614 | Wireless | Metro Pcs, Inc. | 07/16/2013 |
240 | 618 | Wireless | Cellco Partnership Dba Verizon Wireless - Md | 10/07/2014 |
240 | 618 | Wireless | Cellco Partnership Dba Verizon Wireless - Md | 10/07/2014 |
240 | 620 | Landline | Mci Worldcom Communications, Inc. - Md | 08/20/2000 |
240 | 620 | Landline | Mci Worldcom Communications, Inc. - Md | 08/20/2000 |
301 | 637 | Landline | Level 3 Communications, Llc - Md | 08/14/1998 |
301 | 637 | Landline | Level 3 Communications, Llc - Md | 08/14/1998 |
240 | 660 | Wireless | Cellco Partnership Dba Verizon Wireless - Md | 03/31/2015 |
240 | 660 | Wireless | Cellco Partnership Dba Verizon Wireless - Md | 03/31/2015 |
240 | 672 | Landline | Cellco Partnership Dba Verizon Wireless - Md | 10/31/2000 |
240 | 672 | Landline | Cellco Partnership Dba Verizon Wireless - Md | 10/31/2000 |
240 | 694 | Landline | Verizon Maryland, Inc. | 11/20/1998 |
240 | 715 | Landline | Global Crossing Local Services, Inc.-md | 02/27/1999 |
240 | 715 | Landline | Global Crossing Local Services, Inc.-md | 02/27/1999 |
240 | 731 | Wireless | New Cingular Wireless Pcs, Llc - Dc | 10/31/2000 |
240 | 731 | Wireless | New Cingular Wireless Pcs, Llc - Dc | 10/31/2000 |
240 | 731 | Wireless | New Cingular Wireless Pcs, Llc - Dc | 10/31/2000 |
301 | 738 | Landline | Verizon Maryland, Inc. | 02/04/1994 |
301 | 738 | Landline | Verizon Maryland, Inc. | 02/04/1994 |
301 | 738 | Landline | Verizon Maryland, Inc. | 02/04/1994 |
240 | 753 | Landline | Telcove Operations, Inc. - Md | 08/20/2000 |
240 | 753 | Landline | Telcove Operations, Inc. - Md | 08/20/2000 |
240 | 753 | Landline | Telcove Operations, Inc. - Md | 08/20/2000 |
301 | 762 | Landline | Verizon Maryland, Inc. | 02/04/1994 |
301 | 762 | Landline | Verizon Maryland, Inc. | 02/04/1994 |
301 | 762 | Landline | Verizon Maryland, Inc. | 02/04/1994 |
301 | 770 | Landline | Verizon Maryland, Inc. | 02/04/1994 |
301 | 770 | Landline | Verizon Maryland, Inc. | 02/04/1994 |
301 | 770 | Landline | Verizon Maryland, Inc. | 02/04/1994 |
240 | 773 | Landline | Verizon Maryland, Inc. | 10/13/1999 |
240 | 773 | Landline | Verizon Maryland, Inc. | 10/13/1999 |
240 | 773 | Landline | Verizon Maryland, Inc. | 10/13/1999 |
240 | 777 | Landline | Verizon Maryland, Inc. | 05/10/1999 |
240 | 777 | Landline | Verizon Maryland, Inc. | 05/10/1999 |
240 | 777 | Landline | Verizon Maryland, Inc. | 05/10/1999 |
301 | 803 | Landline | Verizon Maryland, Inc. | 02/04/1994 |
301 | 816 | Landline | Verizon Maryland, Inc. | 02/04/1994 |
301 | 816 | Landline | Verizon Maryland, Inc. | 02/04/1994 |
301 | 816 | Landline | Verizon Maryland, Inc. | 02/04/1994 |
301 | 825 | Landline | At&t Local | 08/14/1998 |
301 | 825 | Landline | At&t Local | 08/14/1998 |
240 | 826 | Landline | Verizon Maryland, Inc. | 05/07/2007 |
240 | 826 | Landline | Verizon Maryland, Inc. | 05/07/2007 |
301 | 838 | Landline | Verizon Maryland, Inc. | 07/04/1995 |
301 | 838 | Landline | Verizon Maryland, Inc. | 07/04/1995 |
301 | 838 | Landline | Verizon Maryland, Inc. | 07/04/1995 |
240 | 864 | Landline | Cavalier East Llc - Md | 05/09/2001 |
240 | 864 | Landline | Cavalier East Llc - Md | 05/09/2001 |
301 | 871 | Landline | Verizon Maryland, Inc. | 02/04/1994 |
301 | 871 | Landline | Verizon Maryland, Inc. | 02/04/1994 |
301 | 881 | Landline | Verizon Maryland, Inc. | 02/04/1994 |
301 | 881 | Landline | Verizon Maryland, Inc. | 02/04/1994 |
301 | 881 | Landline | Verizon Maryland, Inc. | 02/04/1994 |
240 | 888 | Wireless | New Cingular Wireless Pcs, Llc - Dc | 03/03/2001 |
240 | 888 | Wireless | New Cingular Wireless Pcs, Llc - Dc | 03/03/2001 |
240 | 888 | Wireless | New Cingular Wireless Pcs, Llc - Dc | 03/03/2001 |
301 | 896 | Landline | Verizon Maryland, Inc. | 01/10/1996 |
301 | 897 | Landline | Verizon Maryland, Inc. | 02/04/1994 |
240 | 907 | Wireless | Cellco Partnership Dba Verizon Wireless - Md | 07/12/2016 |
240 | 907 | Wireless | Cellco Partnership Dba Verizon Wireless - Md | 07/12/2016 |
301 | 917 | Landline | Starpower Communications, Llc - Md | 08/14/1998 |
301 | 917 | Landline | Starpower Communications, Llc - Md | 08/14/1998 |
301 | 917 | Landline | Starpower Communications, Llc - Md | 08/14/1998 |
301 | 956 | Landline | Verizon Maryland, Inc. | 05/22/2002 |
301 | 956 | Landline | Verizon Maryland, Inc. | 05/22/2002 |
301 | 956 | Landline | Verizon Maryland, Inc. | 05/22/2002 |
240 | 970 | Landline | Broadvox-clec, Llc - Md | 06/02/2015 |
301 | 984 | Landline | Verizon Maryland, Inc. | 02/04/1994 |
301 | 984 | Landline | Verizon Maryland, Inc. | 02/04/1994 |
301 | 984 | Landline | Verizon Maryland, Inc. | 02/04/1994 |
240 | 994 | Wireless | Cellco Partnership Dba Verizon Wireless - Md | 10/13/1999 |
240 | 994 | Wireless | Cellco Partnership Dba Verizon Wireless - Md | 10/13/1999 |
240 | 994 | Wireless | Cellco Partnership Dba Verizon Wireless - Md | 10/13/1999 |
301 | 998 | Landline | Verizon Maryland, Inc. | 01/10/1996 |
301 | 998 | Landline | Verizon Maryland, Inc. | 01/10/1996 |
301 | 998 | Landline | Verizon Maryland, Inc. | 01/10/1996 |
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